diff --git a/plantuml/lecture-colours.ipu b/plantuml/lecture-colours.ipu
index 098c168..680e773 100644
--- a/plantuml/lecture-colours.ipu
+++ b/plantuml/lecture-colours.ipu
@@ -50,7 +50,7 @@
 
 		LifeLine {
 			BackgroundColor #F2F2F2
-			BorderColor #3f3f3f
+			BorderColor #7f7f7f
 		}
 	
 		Actor {